Apparatus for replacing a fuel guide pin in a nuclear fuel assem

Details Apparatus for replacing a fuel guide pin in a nuclear fuel assem Apparatus for replacing a fuel guide pin in a nuclear fuel assem

1991-07-08

1992-11-17

Wasil, Daniel D.

Induced nuclear reactions: processes, systems, and elements

Reactor structures

Circulating fluid within reactor

403290, 411 57, G21C 506

Patent

active

051641542

ABSTRACT:
A method and apparatus for replacing an existing fuel guide pin in an upper core plate of a nuclear fuel assembly. The existing guide pin is removed to the level of the bottom of the core plate and inside the bore in the core plate to a point adjacent the pin retaining nut. A longitudinal bore is then created in the remaining portion of the existing fuel guide pin. A replacement fuel guide pin formed from a pin body, collet lock, and bolt is inserted into the bore in the upper core plate and through the bore in the remaining portion of the existing pin. The bolt and collet lock are inserted into a bore at opposite ends of the pin body and threaded together. A tapered shoulder at one end of the collet lock passes through the bore created in the existing guide pin and secures the replacement guide pin to the remaining portion of the existing pin.

REFERENCES:
patent: 990460 (1911-04-01), Skelton
patent: 3401371 (1968-09-01), Hammond
patent: 4235150 (1980-11-01), Nony
patent: 4330230 (1982-05-01), Giannuzzi
patent: 4388031 (1983-06-01), Rodgers
patent: 4820479 (1989-04-01), Hornak et al.
patent: 4934885 (1990-06-01), Woods et al.
patent: 5030413 (1991-07-01), Knierriem et al.
patent: 5089215 (1992-02-01), Landgraf et al.

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